United States Patent (19) 11 Patent Number: 4,886,691 Winckhofer (45) Date of Patent: Dec. 12, 1989

(54. CUT RESISTANT JACKET FOR ROPES, (56) References Cited WEBBING, STRAPS, INFLATABLES AND U.S. PATENT DOCUMENTS THE LIKE 4,321,854 3/1982 Foote et al...... 57/210 4,384,449 5/1983 Byrnes et al...... 57/210 75 Inventor: Robert C. Winckhofer, Richmond, 4,470,251 9/1984 Beltcher ...... 57/210 Va. 4,651,514 3/1987 Collett ...... 57/227 73 Assignee: Allied-Signal Inc., Morris Township, FOREIGN PATENT DOCUMENTS Morris County, N.J. 0027708 10/1980 European Pat. Off. . 0050011 10/1981 European Pat. Off.. (21 Appl. No.: 277,486 0133205 6/1984 European Pat. Off. . 0168774 7/1985 European Pat. Off. . 7906321 3/1979 Fed. Rep. of Germany. (22 Filed: Nov. 29, 1988 8313102 6/1983 Fed. Rep. of Germany . Primary Examiner-James J. Bell Related U.S. Application Data Attorney, Agent, or Firm-Richard A. Anderson 63 Continuation-in-part of Ser. No. 140,530, Jan. 4, 1988, abandoned, which is a continuation-in-part of Ser. No. 57 ABSTRACT 873,669, Jun. 12, 1986, abandoned. This invention is a cut resistant article comprising a cut resistantjacket surrounding a less cut resistant member. 51) Int. Cl."...... B32B 1/04 The jacket comprises a fabric of yarn and the yarn 52 U.S. C...... : 428/68; 57/210; consists essentially of a high strength, longitudinal 27/6; 428/224; 428/229; 428/253; 428/257; strand having a tensile strength of at least 1 GPa. The 428/902 strand is wrapped with another fiber or the same fiber. 58 Field of Search ...... 428/68, 74, 76,224, 428/229, 257, 253,373, 902; 57/210; 87/6 13 Claims, No Drawings 4,886,691 M 1. 2 outer layer. The strand used for the fiber in the jacket CUT RESISTANT JACKET FOR ROPES, may be selected from the group consisting of anaramid, WEBBING, STRAPS, INFLATABLES AND THE ultrahigh molecular weight polyolefin, carbon, metal, LKE fiberglass and combinations thereof. The fiber used to 5 wrap the longitudinal strand (or strands) can be selected This application is a continuation of application Ser. from the group consisting of an aramid fiber, ultrahigh No. 140,530 filed Jan. 4, 1988 now abandoned which is molecular weight polyolefin fiber, carbon fiber, metal a continuation-in-part of Ser. No. 873,669, filed June 12, fiber, polyamide fiber, polyester fiber, normal molecu 1986, now abandoned. lar weight polyolefin fiber, fiberglass, polyacrylic fiber O BACKGROUND OF THE INVENTION and combinations thereof. When the fiber wrapping is a high strength fiber having strength over 1 GPa, the This invention relates to a cut resistant jacket for ropes, webbing, straps, inflatables and the like, more preferred fiber wrapping is selected from the group particularly a cut resistant article comprising a cut resis consisting of aramid fiber, ultra high molecular weight tant jacket surrounding a less cut resistant member 15 polyolefin fiber, carbon fiber, metal fiber, fiberglass and where the jacket comprises a fabric of a yarn and the combinations thereof. yarn consists essentially of a high strength, longitudinal The polyolefin fiber of this invention can be ultrahigh strand having a tensile strength of at least 1 GPa and the molecular weight polyethylene or polypropylene, pref. strand is wrapped with a fiber. erably polyethylene, commercial examples are Spec It is known to make cut resistant fabric for gloves 20 tra (R900 or Spectra (R1000. used for safety in the meat cutting industry. For exam The fiber wrapping can also be a blend of a lower ple see U.S. Pat. No. 4470 251, U.S. Pat. No. 4384. 449 strength fiber with the high strength fiber. Such lower and U.S. Pat. No. 4 004 295 all hereby incorporated by strength fiber can be selected from the group consisting reference. It is also known to make a composite line of polyamide, polyester, fiber glass, polyacrylic fiber containing two different filamentary materials in the 25 and combinations thereof. form of a core and a jacket of different tensile strengths The article of this invention can also have more than and elongations as in U.S. Pat. No. 4 321 854 hereby one jacket surrounding the less cut resistant member. incorporated by reference. It is also known to make In another embodiment, the article of this invention composite strand, cables, yarns, ropes, textiles, filaments has a material present in the interstices of the fabric of and the like in other prior U.S. patents not cited herein. 30 the jacket to bond the yarn of the fabric to adjacent By ultrahigh molecular weight is meant 300,000 to yarn of the fabric thereby increasing penetration resis 7,000,000. Normal molecular weight is then below tance of the jacket. The material used in the interstices 300,000. can be any elastomer, preferably a thermoplastic rubber By fiber herein is meant any thread, filament or the and more preferably a material selected from the group like, alone or in groups of multifilaments, continuous 35 consisting of polyurethane, polyethylene and polyvinyl running lengths or short lengths such as staple. chloride. By yarn herein is meant any continuous running length of fibers, which may be wrapped with similar or DESCRIPTION OF THE PREFERRED dissimilar fiber, suitable for further processing into fab EMBODIMENTS ric by braiding, weaving, fusion bonding, tufting, knit 40 Yarns for Jacket Fabric ting or the like, having a denier less than 10,000. A yarn to be used to make the protective jacket fabric By strand herein is meant either a running length of is made by wrapping one longitudinal strand of stainless multifilament end or a monofilament end of continuous steel wire having a diameter of 0.11 mm and one parallel fiber or spun staple fibers, preferably untwisted, having strand of an ultrahigh molecular weight polyethylene a denier less than 2,000, or metal of diameter less than 45 fiber having a tensile strength of 3 GPa modulus of 171 0.01 inches. GPa, elongation of 2.7 percent, denier of 650 and 120 SUMMARY OF THE INVENTION filaments per strand or end. This yarn is commercially This invention is a cut resistant article comprising a available as Spectra (R)1000 fiber from Allied Corpora cut resistantjacket surrounding a less cut resistant mem 50 tion. The wrapping fiber is a polyester of 500 denier, 70 ber. The jacket comprises a fabric of yarn. The yarn filaments per end, having a tensile strength of 1.00 GPa, consists essentially of a high strength, longitudinal modulus of 13.2 GPa, elongation of 14 percent. For strand having a tensile strength of at least 1 GPa. More yarn. A two layered wraps of the above polyester fiber than one strand can be used. This strand (or strands) is are used to wrap the parallel strands of wire and high wrapped with a fiber. The fiber may be the same or 55 strength polyethylene. different than the longitudinal yarn. For yarn B one layer of the ultrahigh molecular It is preferred that the fiber wrapped around the weight polyethylene fiber described above is used as the strand also have a tensile strength of at least 1 GPa. innermost layer wrapped around the strands, the outer The less cut resistant member can be selected from layer being the polyester fiber. the group consisting of rope, webbing, strap, hose and Alternatively, an aramid such as Kevlar could be inflatable structures. used to replace the ultrahigh molecular weight polyeth The core strand fiber of the rope, webbing, strap or ylene, either as the strand or as the fiber for wrapping. inflatable structures could be fiber of nylon, polyester, Comparative Yarn C-a polyester of 3600 denier, 1. polypropylene, polyethylene, aramid, ultrahigh molec GPa tensile strength, 13.2 GPa modulus and 14 percent ular weight high strength polyethylene or any other 65 elongation, without wrapping. known fiber for the use. This wrapped yarn (A or B) or comparative yarn C The inflatable structure would be a less cut resistant can then be braided, knitted, woven or otherwise made layer having the fabric of this invention as a jacket or into fabric used as the jacket of this invention. 4,886,691 3 4. This jacket can then be used to surround ropes, web was pressed. There was no evidence of even the jacket bing, straps, inflatable structure, and the like. The jacket having been cut. Because of this only Sample 3 rope can be made from one or more ends of yarn per carrier was tested at 500 pounds force in the cut damage test. It in the braider apparatus. Either full or partial coverage retained 92 percent strength and sustained no jacket of the core of braided or parallel strands can be cutting. achieved. The yarn for the fabric used for the jacket in this invention can also be wrapped in a conventional EXAMPLE 2 manner such as simply wrapping the strand of high strength fiber or by core spinning or by Tazalanizing or Abrasion Resistance any other method to put a wrap of yarn around the 10 Comparative Sample 2 and Sample 3 (this invention) strand or strands. were tested for abrasion resistance of the jacket by the test described below. Sample 3 was a -inch (0.6 cm) EXAMPLE 1. stranded rope jacketed with a braided fabric of yarn A. Tests on Ropes In the test each sample rope was bent in a 90 degree Three different stranded ropes, jacketed with a cut 15 angle over a 10-inch (25.3 cm) diameter abrasive wheel. protective fabric, were tested for cut resistance. Three The ropes were loaded with 180 pounds (81.8 kg) and conventional stranded -inch (0.6 cm) ropes were made reciprocated through a 3-inch (7.6 cm) stroke as the and a special braided yarn fabric was used to surround abrasive wheel rotated at 3 rpm. The test ended when the rope core as a jacket. The jacket can be formed the jacket wore through. The number of strokes (cy either separately and placed on the core of rope or 20 cles) for each was 8 for Comparative Sample 2 and 80 formed around the core during one of the manufactur for Sample 3. ing steps. EXAMPLE 3 Comparative Sample 1 was a Kevlar stranded rope jacketed with fabric braided from comparative yarn C. Braided Rope Comparative Sample 2 was an ultrahigh molecular 25 Four -inch (0.6 cm) braided ropes were tested with weight high strength polyethylene (Spectra (R900) fiber various jackets. Comparative Sample 4 rope was stranded rope jacketed with fabric braided from com braided from the high strength, ultrahigh molecular parative yarn C. Example of this invention Sample 3 weight polyethylene yarn described above and the was the above-described ultrahigh molecular weight jacket was braided from a polyester yarn of 1000 denier, polyethylene (Spectra (R)) fiber strand rope, surrounded 30 192 filaments per end, 1.05 GPa tensile strength, 15.9 with a jacket braided from Yarn A. Spectra 900 fiber GPa modulus, and 15 percent elongation. has a denier of 1200, 118 filaments per strand typically, Sample 5 rope was braided from Kevlar yarn of 1875 tensile strength of 2.6 GPa, modulus of 120 GPa and denier, 2.53 GPa tensile strength,660.4 GPa modulus elongation of 3.5 percent. and 3.5 percent elongation. The jacket was as in Sample The three jacketed ropes were tested by a guillotine 35 3. test. In the guillotine test, the rope was held in a fixture Sample 6 rope was also braided, from the high so its movement was restricted. Clamps prevented it strength ultrahigh molecular weight polyethylene yarn from moving along its axis and the rope was inside two described above, under low tension to give a "soft' pieces of pipe to prevent it from deflecting during cut rope. The jacket used was as in Sample 3. ting. The two pieces of pipe were separated very Sample 7 rope was identical to Sample 6 except more slightly where the blade made the cut. The maximum tension was applied during braiding of the rope to cre force needed to completely sever the rope was mea ate a "hard' rope. sured. A fixed load was applied to the rope as in Example 1. In the second test, the cut-damage test, the rope was When the ropes were taut under the knife, there was laid on a wooden surface without further restraint. A 45 little difference in cut resistance between ropes. In the blade was then forced into the rope at 250 pounds (113.6 cut damage test, the results are below. kg) of force. The damaged ropes were tested for re tained strength. In both tests a new Stanley blade no. Cut Damage Tolerance 1992 was used for each sample tested. The results of the Percent Strength Retained tests are given below. 50 Sample 4. s 6 7 Guillotine Test Results 43 54 100 82 Pounds of Force to Cut Comparative Comparative 55 Test Sample 1 Sample 2 Sample 3 Best Mode (kg) (kg) (kg) l 132 (60) 227 (103) 684 (311) The following is the best mode of this invention. 2 139 (61.8) 335 (152) 638 (290) It is believed the most cut resistant structure, rope, 3 144 (65.5) 286 (130) 616 (280) webbing or strap, would use either of the above de Avg. 138 (62.7) 282 (128) 646 (294) scribed ultrahigh molecular weight polyethylene fibers Cut Damage Test Results, Percent Strength Retained as core, either braided or as strands, covered by a jacket 73 85 97 made, preferably braided, from a yarn having the inner strands of 0.11 mm stainless laid parallel to a strand of Observation of the cut damage test ("abused') ropes the ultrahigh molecular weight polyethylene fiber of showed that the Sample 1 rope was cleanly cut part way 65 highest tensile strength (Spectra 1000), the strands being through. The Sample 2 rope jacket was also partly cut wrapped with an inner wrap of the lower tensile through but the filaments were not as cleanly cut. Sam strength polyethylene fiber (Spectra 900) and outer ple 3 rope showed only a depression where the blade wrap of polyester fiber described in yarn B, above. 4,886,691 5 6 A laboratory study of eleven lines was undertaken by mored with nylon 6/6 (Zytel ST 801). It is typical of an independent laboratory to ascertain the degree of many plastic covered lines in that it has good handling fishbite resistance which each one might have when qualities but it is less bite resistant than the acetal co used as a deep sea mooring line. In addition to general polymer. It is regarded as a marginal fishibite armor considerations based upon the composition and con 5 marking the bottom of the range of acceptable materi struction of the lines, three laboratory tests were used als. If a jacket has less stab and cut resistance than nylon for objective measurement of resistance to stabbing and 6/6, it probably would not be a trustworthy barrier cutting. Tests were run on the lines when unstressed against fishbite damage in all situations. and when under a working load. Results of the laboratory tests are summarized, and 10 CONSTRUCTION OF LINES where available, the generic and trade names of fibers and plastic jackets are given in Table II. The thickness All of the test lines had cores composed of parallel of plastic jackets was measured on pieces taken from the synthetic fibers. Six lines had cores of polyester fiber. test lines and is noted in parentheses after each generic Three had cores of Kevlar fiber, and one had a core of name. A few data are missing, as in the case of sample Spectra (E900. 15 The cores of lines with polyester cores were wrapped #1, where the available sample was destroyed in pre with a tape of polyester cloth which in turn was cov liminary testing. It was not replaced because sample #6 ered by a braided polyester cover. The cores of ropes is a duplicate with a heavier jacket. Problems in finding from other sources had a wrapping which appeared to adequate terminations for lines #10 were not resolved be the same. Table I contains a summary of information 20 in time for this report, so they were not tested under on the test lines. Sample 9 is illustrative of the invention tension. herein. All other samples are thought to be compara EVALUATION OF THE LINES tive. Due to the variety of line constructions, and the char TEST METHODS 25 acteristics of test methods, there is no obvious winner in Resistance to penetration by sharp points was mea all categories. To aid in interpreting the data, tables. sured in two ways: 1) using the Shore D scale of a have been prepared for each test used. Durometer (ASTM method #2240), and by stabbing Table III illustrates data obtained with the Durome with a simulated shark tooth of hardened steel as de ter and it is evident that by this test none of the lines scribed in the "Deep-Sea Lines Fishbite Manual' (Prin 30 submitted was equal to either of the armored reference dle & Walden, 1975). Each data point from the penetra lines i.e. Acetal Copolymer (AC) or Nylon (N), when tion tests is an average offive measurements of the force tested without tension. The best of the test lines were required to pierce the surface of a line to a standard #1 armored with 47 mils of ionomer, #6 armored with distance. 76 mils of ionomer, and #10 armored with 114 mils of Force-to-Cut tests were run on unstressed line sam 35 polyester. The rest were below a level which would ples using the Baldwin Universal Testing Machine as seem to warrant further consideration. However, some described and illustrated in the "Deep-Sea Lines Fish mention should be given to the samples armored with bite Manual.' braids. They are #7 armored with polyolefin and alumi In so far as possible within constraints of time and num braid, #8 armored with Kevlar braid, and #9 ar availability of materials, stab and cut tests were re 40 mored with polyurethane and a metal braid. All three peated on the lines loaded with 1125 lbs. tension. The ranked low in the Durometer test, probably because the load was applied by lifting a weight with the test line. conical point of the Durometer slipped between the The ends of most rope specimens were secured by strands of the braids. #8, which ranked last in this test, means of a "Chinese finger' method in which the end of . was first in cut resistance. Hence, it appears that the the test line was inserted inside a hollow braid rope 45 Durometer test may be a useful measure of toughness which secured it by friction when tension was applied. for homogeneous plastic armors, but is not the whole Durometer and Stab tests were run in the usual ways, story when used on items with a discontinuous cover. but Force-to-Cuttests were done with the cutting blade In all cases where lines were tested slack and again mounted in a stirrup which was used to pull the blade when stressed, the Durometer readings were either the across the test line. This method is also illustrated in the 50 same within experimental error or increased when the "Deep-Sea Lines Fishbite Manual” using a shark jaw as line was under tension. the cutting instrument. All cutting force data are the result of single cuts on STAB TEST the lines indicated. Tests were run on line samples at The single tooth stab test is similar to the Durometer ambient conditions of approximately 70' F. and variable 55 test in that a pint is forced into the line, but there is the relative humidity. added possibility of cutting by the tooth edges. Table IV illustrates the relative resistance of the lines under LABORATORY TEST RESULTS this test. . Data from three previously tested 13/32" diameter When the lines were tested slack, the Acetal Copoly polyester ropes both unprotected and armored have 60 mer (AC) was again the most resistant, requiring 63 lbs. been added as standards of reference. Of the two ar to pierce. Second place went to #10, armored with 114 mors, acetal copolymer (Celcon M25-04) confers a high mils of polyester. It had 70% the resistance of the acetal degree of bite resistance. When tested at sea, it proved copolymer reference line and out performed the Nylon adequate to protect a line under strong biting attack. 6/6 (N) reference standard. Next in line was item #9, Unfortunately, the Celcon M25-04 formulation cracked 65 armored with polyurethane and braid. The next few during handling so it is not a practical armor, but it is spots went to items #1, 5, 6, and 7 with only 71% the useful here as an example of material with the degree of stab resistance of the marginally acceptable nylon 6/6 toughness needed. The second reference line was ar covered line. 4,886,691 7 8 Tension produced marked changes in the ratings. #1 the reference lines. This is a good line and worth a test spot went to item #9, urethane and braid armor, which at Sea. rose from 35 lbs. resistance to 58 lbs. Under tension, it Sample 6-3" dia. polyester fiber (SynCore) rope was substantially equal to acetal copolymer in the un with 76 mils of ionomer (Surlyn) jacket. This line had stressed condition. With tension, there were 3 lines good handling properties, however, overall it was a closely competitive for second place at a level of about little below the nylon 6/6 reference line in the three 38 lbs. which is the same as the acetal copolymer refer tests. It would be interesting in a test at sea as a line with ence line, and better than the nylon 6/6 armored line at minimal resistance for the job of fishbite prevention. 31 lbs. All three braid-covered lines showed an increase Sample 8-' dia. Kevlar with a coarse Kevlar in resistance to stabbing when a tensile load was ap O braided jacket. This line was interesting in that it was plied. near the bottom in resistance to penetration, especially FORCE TO CUT when slack, however, it was number one in cut resis tance. The effect of tension was to increase its resistance In the cutting force test, unlike the others, progress of in all three tests. Loaded, it became so resistant to cut the cutting edge can only be made when armor and 15 ting that the steel blade was broken before the line fibers have been severed. The test results shown in suffered any significant damage. More testing of this Table V are now quite different. type of line with reference to fishbite is definitely indi Four of the test lines were more resistant to cutting cated. than the two reference lines, both in the relaxed and in Overall, the results indicate that braids have interest the stressed conditions. 20 ing properties in resistance to cutting but they are sus With two outstanding exceptions, items #8 and 9, all ceptible to penetration by sharp points especially when lines lost cut resistance when tested under tension. The a line is slack. Plastic armors, on the other hand, lose cut five lines which were comparable to the nylon 6/6 resistance when stretched. Combinations of the two reference, when tested slack, dropped to levels so low should probably be investigated further toward making as to eliminate them from further consideration. 25 a line with effective bite resistance under all conditions. CHOICE OF LINES FOR TESTAT SEA A choice of lines for test at sea is complicated by TABLE variables in line materials and construction. Overall, Lines submitted for laboratory tests there are three kinds of constructions represented: 30 Relative to Fishbite resistance 1. Ropes armored with a layer of plastic only. Construction 2. Ropes covered with a braid only. Sample No. Core Jacket (mils) 3. Ropes jacketed with a combination of braid and (All lines parallel plastic. fiber core) 35 1. 1/2" polyester Ionomer (47) A review of the test data as illustrated in Tables III, Surlyn IV and V together with available information on the Polyurethane lines will show that there is at least one rope in each Texin category that merits further study. Thermoplastic Taking the lines in order of their overall resistance to elastomer (41) Kraton puncture and cutting, the best five lines are as follows: Thermoplastic Sample 10-3" dia. Kevlar rope armored with 114 elastomer (43) mils of polyester (Hytrel). This line is bulky and very Santoprene stiff. It could only be handled with heavy machinery. Polyester (52) Unfortunately, a method for terminating this line could Hytrel Ionomer (76) not be managed in time for this report, but results on the 45 Surlyn unstressed line indicate that it is worth consideration for 7 5/16" Kevlar Polyolefin and further tests. aluminum braid 8 3/8" Kevlar Kevlar braid Sample 9-3" dia. rope of Spectra (R)900 fiber coated 9 1/4" Spectra Urethane coated with a polyurethane over SPECTRA fiber plus metal braid core yarn braid jacket. This line is flexible and has good 50 10 5/8 Kevlar Polyester (114) handling qualities. It is vulnerable to stabbing when Hytrel slack but gains resistance when under a working load. It "braid made from yarn of strands of SPECTRA (R) fiber combined with stainless was superior to the acetal copolymer reference line in wire, first wrapped with SPECRA fiber, then wrapped with polyester fiber. resistance to cutting. 15 Information on the susceptibil ity to deterioration in sea water is needed to complete 55 TABLE II the information required for an unqualified recommen dation of this line for a test at sea. Resistance of lines to cutting and stabbing Sample 7-5/16" dia. Kevlar rope with polyolefin Durom.-Shore D and aluminum braid armor. The armor on this line was Sample Construction Un- 112Sb, composed of 35 mils of polyolefin over the Kevlar fiber Number Core Jacket (mils) Stressed Tension plus a layer of aluminum braid plus 41 mils of polyole " Polyester Ionomer (47) 65 2 Polyurethane fin. It was a good handling line albeit a bit stiffer than (56) 34 44 some others. The Durometer test was below that of 3 Thermoplastic nylon 6/6. Stab test on the relaxed rope was below that elastomer (41) 23 28 of nylon 6/6 but when the line was loaded it became 65 4 Thermoplastic santoprene (43) 19 28 much more resistant to stabbing and was about equal to 5 Polyester (52) 49 52 acetal copolymer. In the cut test, it ranked third when 6 Polyaramide Ionomer (76) 65 66 unstressed and when stressed, it was superior to both of 7 5/6' Kevlar Polyolefin and 4,886,691 9 10 TABLE II-continued TABLE V Resistance of lines to cutting and stabbing Force to Cut - Sample Force to Cut-bs. 8 3/8' aluminum braid 50 51 No. Rank Unstressed Under Tension A8' Kevlar Kevlar braid 14 30 5 9 "Spectra Polyurethane 1 6 O coated braid 46 51 2 10 95 2O 10 5/8" Kevlar Polyester (114) 59 f AC 13/32". Poly- Acetyl 81 5 7 105 20 ester copolymer (78) O 6 7 105 30 N Nylon 6/6 (63) 78 7 3 310 270 O FF None re- 8 1 360 >480 Stab Force-libs. Cut Force-bs. t 5. so Sample 2Sb, Un- 12Sb. Unjacketed 12 10 5 Number Unstressed Tension Stressed Tension 15 AC 5 230 >30 N 8 105 >25 28 W 115 2 23 3. 97 22 3 1. 22 98 14 What is claimed is: 4. 2 17 34 6 1. A cut resistant article comprising 5 27 36 107 23 20 (a) a less cut resistant member surrounded by 6 29 38 107 45 (b) a more cut resistantjacket, said more cut resistant 7 27 38 306 264 jacket comprising a fabric of yarn, : 2. > said yarn in said fabric consisting essentially of 10 44 352 OOO (c) at least one high strength longitudinal strand hav AC 63 38 21 >45 25 ing a tensile strength of at least 1 GPa, and N 39 31: 104 >37 (d) a fiber wrapped around said strand. O 14 2. 2. The article of claim 1 wherein said fiber wrapped 1200 lbs. tension on the line around said strand also has a tensile strength of at least See footnote Table I 1 GPa. 30 3. The article of claim 1 wherein the less cut resistant member is selected from the group consisting of rope, TABLE III webbing, strap, hose and inflatable structure. Durometer Test 4. The article of claim 1 wherein the strand is selected Armor Resistance to Reaction from the group consisting of aramid, ultrahigh molecu Sample Material Durometer-Shore D 35 lar weight polyolefin, carbon, metal, fiber glass and No, Thickness Mills Rank Unstressed Under Tension combinations thereof. 47 3 63 5. The article of claim 4 wherein the polyolefin is 2 56 8 36 43 polyethylene. 3 41 9 23 25 6. The article of claim 1 wherein the fiber wrapping is 4. 43 10 19. 24 40 selected from the group consisting of aramid fiber, ul 5 52 6 48 52 trahigh molecular weight polyolefin fiber, carbon fiber, 6 76 3 63 64 metal fiber, polyamide fiber, polyester fiber, fiberglass, 7 o 5 48 50 polyacrylic fiber, normal molecular weight polyolefin 8 11 4. 26 fiber and combinations thereof. t 1. 52 45 7. The article of claim 2 wherein the fiber wrapping is AC 78 1. 80 selected from the group consisting of aramid fiber, ul N 63 2 78 trahigh molecular weight polyolefin fiber, carbon fiber, metal fiber and combinations thereof. 8. The article of claim 7 wherein the fiber wrapping TABLE IV 50 also contains a. lower strength fiber selected from the group consisting o polyamide, polyester, fiber glass, Stab Test polyacrylic fiber and combinations; thereof. Sample Force to Stab-bs. 9. The article of claim 1 wherein more than one No. Rank Unstressed Under Tension jacket surrounds said less cut resistant member. 1. 6 26 55 10. The article of claim 1 wherein said jacket also 2 8 23 31 comprises a material present in the interstices of the 3 12 2. fabric to bond the yarn of fabric to adjacent yarn of the 4. 10 13 17 fabric, thereby increasing penetration resistance of the 5 7 24 38 jacket. 6 5 28 38 60 11. The article of claim 10 wherein said material is an 7 7 24 38 elastomer. : 12. The article of claim 10 wherein said elastomer is a 10 2 43 thermoplastic rubber. AC 1. 63 38 13. The article of claim 10 wherein the material used N 3 39 3. 65 to bond the yarn of the fabric to itself is selected from the group consisting of polyurethane, polyethylene and polyvinyl chloride. :: 2 is :